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Date:	Mon, 16 Apr 2001 00:05:43 -0400
From:	Christopher Faylor <cgf AT redhat DOT com>
To:	cygwin-apps AT cygwin DOT com
Cc:	newlib AT sources DOT redhat DOT com
Subject:	Re: next porting question for gcj
Message-ID:	<20010416000543.B28133@redhat.com>
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References:	<01b301c0c621$063e4ae0$0200a8c0 AT lifelesswks> <200104160327 DOT XAA06356 AT envy DOT delorie DOT com> <01dc01c0c628$23c1f880$0200a8c0 AT lifelesswks>
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In-Reply-To:	<01dc01c0c628$23c1f880$0200a8c0@lifelesswks>; from robert.collins@itdomain.com.au on Mon, Apr 16, 2001 at 01:48:45PM +1000

On Mon, Apr 16, 2001 at 01:48:45PM +1000, Robert Collins wrote:
>I've done some debug tracking and patched gcj to apparently work
>correctly under cygwin. libjava just seems to have some header issues.
>
>Would inserting  the __builtin_alloca define be a reasonable workaround?
>(__CYGWIN__ protected of course).

IMO, newlib's stdlib.h should have something like this in it:

#ifdef __GNUC__ 
# define alloca __builtin_alloca
#endif

Does this make sense?  Or is this a little too generic for newlib?
It may be that some platforms, supported by newlib and gcc, do not
support __builtin_alloca.

The alternative would be to do something like:

#if defined(__GNU__) && defined(_USE_BUILTIN_ALLOCA)
# define alloca __builtin_alloca
#endif

and have features.h:
#define _USE_BUILTIN_ALLOCA

Comments?

cgf

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